Boring tool



June 1 14926.

BORING TOOL Filed Dec. 20, 1920 2 Sheets-Sheet 2 RW @my 1,581,092 W. C. VAN DRESSER Patented June 1, 1926.

UNITED STTES rarer Feier..

W'ILLIAIV C. VAN DRESSER, 0F DETROT, ItICHIGhN, ASSGNOR TO VAN BROTHERS, A COPARTNERSHIP CGMSED GF 'iTtTILLALlI 0. VAN B. VAN DRESSER AND FR-MNKP. Vl'l' DEESSER, WESLEY BORING- TQOL.

Application filed December 20, 19530. Serialio. 431,844.

lroadly my invention relates to inea-ns for advancing a driven spindle or feed bar. l provide feed mechanism adapted to eooperate with a rotating spindle so as to convert its n'iovement of rotation into longitudinal movement at a desired rate of advance as shown in the drawings andherein described and claimed.

Particularly, my invention relates to an improved portable reboring tool for reaming cylinders. The object is to provide a reborino' tool, the driven spindle of which is adapted to be advanced at L@desired rate b v means of an improved type of feed mechanism. The rate of advance for such spinn (lle might be, for example, l.O3 of an inch per revolution.

Ai further object is the provision of feed mechanism adapted to be easily7 and quickly released from its driving couple with t-lie spindle t0 permit removal o'f the spindle without hindrance by the feed mechanism, and also to permit the spindle to be driven independently of the feed mechanism7 such as connecting the spindle with a drill press driving socket and driving` at any of the varying` rates provided by such means, or other power driving i'neans.

ln the drawings:

Fig. l is a view of my device in which t-he driving spindle is shown in elevation, the housing being sectioned to show the Working parts.

Fig. 2 is a vertical section through the feed mechanism, the driving spindle being shown in elevation.

Fig. 3 is a plan in which the housing cover is removed.

Fig. 4 is a side elevation of the clutch mechanism showing the saine disengaged.

Fig. 5 is a section taken on line 5-5 of Fig. 2.

Let a. indicate the driven spindle or rotating feed bar, the end of Whicln a2, is adapted to be received by any conventional driving socket so it may be rotated. rlhe opposite end of the spindle carries a cutter head, o. No claim of novelty is made to the cutter head, as any type of cutter head would serve the purpose, therefore no description is given of the cutter head. Along one side of the spindle is a rack Z).

This rack spindle or feed bar is joursurface and the spindle may therefore be of hardened steel possessing long wearing qualities. 'the housing' is provided With a removable cover ft. held in place by bolt-s ff'. and is supported by a base d. which is adapted to be attached t0 a cylinder block c so as to center the boring tool over the cylinder. Y

llhe housing is provided with an internal thread ,7. here shoivnas a large acme thread suitable for the purpose desired rlhe feed meehanism comprises a casing g/ which is splined on thespindle by means of a hey g2, so that the casing will rotate With the spindle while permitting longitudinal movement of the spindle therethrough. The casing g is supported in position by the retaining flanges g3 on the bearings f2 and Casing g carries a bevel gear z' which is engaged in the thread L in the housing so that for each revolution of the spindle the bevel gear t rotates the distance of one tooth. This bevel gear e' is carried by a spindle., at the other end of which is a reduction gear 2. This bevel gear spindle is mounted for rotation in a bearing 7c and itis held in position therein by means of a retaining Washer m secured to the end of the spindle by a pin m2. This Washer m rests against the end of the bearing 7s. The bearing fc is cut away below the gear i2 so that algear n carried by pinion spindle 0' may mesh With the gear 2.

rlhe gear n is freely mounted on the spindle o so as to permit of independent rotation of the spindle, but is adapted to be locked thereto as shown in Figs. 2, 3 and fr. so as to rotate therewith. The spindle 0 is provided with a pinion p Whch meshes with the rack o on the feed bar a so as to drive such bai' when the pinion is driven. This spindle 0 is mounted for rotation in h ai'ngs Q and g2.

lWhen the gear n is secured to the spindle 0 so as to rotate therewith and the feed bar a. is rotated, the bevel gear z' being in engage nient with the thread 7e, in the housing, will through the train of gears feed the feed bar through the housing.

tl tl As a means for securing the gear n to the spindle 0 I provide a clutch collar p provided with a tongue p2 adapted to be reveeived in a groove o2 in the end of the spin- -as one piece. This collar is held to the spindle by .means of a pin g threaded into the end of the spindle. This clutch collar is mounted yieldingly on the pin by means of a spring 1" disposed Within a sleeve pressed in the Collar so as to be carried thereby so that when the collar is drawn outwardly to release the tongue p2 from its engagement in the groove 02, this outward movement is against the resistance of the spring 1", which therefore serves to hold the clutch collar in position when seated.

What I claim is:

l. In a reboring tool, an internally threaded housing, a rack feed bar journaled for rotation therein, feed mechanism comprising a casing liournaled in the housing and splined on the feed bar to rotate therewith, a spindle journaled in, the casing and provided at one end With a driving gear adapted to engage in the thread of the housing so as to rotate through an are of rotation equal to one tooth With each revolution of `the feed bar, a pinion spindle journaled in the casing provided With a pinion engaged in the rack of the feed bar`l a train of gears coupling said pinion spindle and driving gear spindle together for rotation, means for releasing one of the gears in said train from its su )porting spindle so that the feed bar may 'ie reeiprocated indepr-mdently of the feed mechanism.

2. In a reboring tool, an internally threaded housing, a feed bar extending through the housing, feed mechanism splined on the feed bar' interior the housing comprising a gear engaged in the thread of the housing adapted to rotate on its own axis as it revolves with the feed bar, a pinion engaging with the rack of the feed bar, a tra-in of reduct-ion gears oonneoting said gear and pinion so the pinion will be driven by the rotation ofthe gear engaged in the housing thread, means for unooimling said train of gears so as to permit the feed bar to be advanced or withdrawn independently of the feed mechanism` the pinion idling over the rack.

In testimony vvhereof` I, W'ILLIAM C. VAN Dnnssnn, sign `this specification.

VILLIAM C. VAN DRESSER. 

